Tribological Properties of TiN/Ag Nanocomposite Coatings |
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Authors: | Harald Köstenbauer Gerardo A. Fontalvo Christian Mitterer Jozef Keckes |
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Affiliation: | (1) Department of Physical Metallurgy and Materials Testing, University of Leoben, Leoben, 8700, Austria;(2) Department of Materials Physics, University of Leoben, Leoben, 8700, Austria |
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Abstract: | Morphology, structure, and tribological behavior of magnetron co-sputtered TiN/Ag nanocomposite coatings deposited at 150 °C with an Ag content in the range of 7–45 at.% were characterized. The coatings show a columnar structure with embedded Ag crystallites of 3–50 nm in diameter, where the columns are characterized by a layered structure with Ag-poor and Ag-rich layers. These layers originate from sample rotation during deposition, where the layer thickness increases with increasing Ag content. These Ag layers become continuous over a critical Ag content. At room temperature the friction coefficient is determined by the film structure, whereas friction and wear at high temperature depend on segregation of Ag to the surface. |
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Keywords: | Nitrides Silver Self lubricating composites Wear-resistant coatings |
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